Warning – CiDRA GVF-100 Gas Volume Fraction Monitoring System User Manual

Page 81

Page 10-7

20639-01 Rev 03

The following table lists the alarm parameters with their default values.

Alarm Parameter

Condition

User

Entry

Warning

Default Value

Critical

Default Value

TMP>

> 80 °C

> 90 °C

Band Temperature

TMP<

< 0 °C

SPL>

> 200 dB

RMS Sound Pressure
Level

SPL<

< 50 dB

< 80 dB

Speed Of Sound Quality

SSQ<

< 0.03

< 0.01

Event log updated

LOG

Sensor overload

OVL

GVF>

> 100 %

> 100%

Gas Volume Fraction

GVF<

< 0%

Sensor Failure

FAIL

Table 15

Alarm Triggers

Note: The alarm trigger for Gas Volume Fraction (GVF) can be set
from the transmitter menu. All other values must be set using
SONARtrac Basic (or higher level) user program.

Up to three alarm triggers can be selected. For example, an alarm
output may be programmed like this:

Warning = TMP I LOG I GVF

(Warning = Band Temperature or Event Log Updated or GVF)

Critical = FAIL I OVL & LOG

(Critical = Sensor Fail or Sensor Overload and Event Log Updated

The menu inputs for setting ‘Alarm’ are described in the following
paragraphs.

‘Alarm Control’ menu is used to activate the ‘Warning’ and ‘Critical’
alarm functions. Once turned ‘On’ it is used to select the parameters
the alarm will activate on (refer to Table 16).

The ‘Manual Clear’ function under ‘Alarm Control’ has options of
‘Disable’ and ‘Enable’. In the ‘Disable’ mode the alarm will
automatically clear when the alarm condition no longer exists. In the
‘Enable’ mode, the alarm must be reset manually by opening the front
door of the transmitter and pressing the ‘Exit’ button. Note: For
transmitters installed in Class I Division 2 area follow established
safety procedures prior to opening transmitter door.

WARNING

For Class I, Division 2 applications, follow established safety
procedures prior to opening transmitter door.

The ‘Alarm Warn Threshold’ and ‘Alarm Crit Threshold’ menu
selections are used to set the flow rate and gas volume fraction alarm
set points. All other parameters must be set using the Configure
menu options in SONARtrac Basic Program.